دورية أكاديمية
Strategies to Apply Water-Deficit Stress: Similarities and Disparities at the Whole Plant Metabolism Level in Medicago truncatula
العنوان: | Strategies to Apply Water-Deficit Stress: Similarities and Disparities at the Whole Plant Metabolism Level in Medicago truncatula |
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المؤلفون: | Verónica Castañeda, Esther M. González |
المصدر: | International Journal of Molecular Sciences, Vol 22, Iss 6, p 2813 (2021) |
بيانات النشر: | MDPI AG, 2021. |
سنة النشر: | 2021 |
المجموعة: | LCC:Biology (General) LCC:Chemistry |
مصطلحات موضوعية: | Water stress, phloem sap, PEG, salt stress, proline, carbon metabolism, Biology (General), QH301-705.5, Chemistry, QD1-999 |
الوصف: | Water-deficit stresses such as drought and salinity are the most important factors limiting crop productivity. Hence, understanding the plant responses to these stresses is key for the improvement of their tolerance and yield. In this study M. truncatula plants were subjected to 250 mM NaCl as well as reduced irrigation (No-W) and 250 g/L polyethylene glycol (PEG)-6000 to induce salinity and drought stress, respectively, provoking a drop to −1.7 MPa in leaf water potential. The whole plant physiology and metabolism was explored by characterizing the stress responses at root, phloem sap and leaf organ level. PEG treatment led to some typical responses of plants to drought stress, but in addition to PEG uptake, an important impairment of nutrient uptake and a different regulation of carbon metabolism could be observed compared to No-W plants. No-W plants showed an important redistribution of antioxidants and assimilates to the root tissue, with a distinctive increase in root proline degradation and alkaline invertase activity. On the contrary, salinity provoked an increase in leaf starch and isocitrate dehydrogenase activity, suggesting key roles in the plant response to this stress. Overall, results suggest higher protection of salt-stressed shoots and non-irrigated roots through different mechanisms, including the regulation of proline and carbon metabolism, while discarding PEG as safe mimicker of drought. This raises the need to understand the effect at the whole plant level of the different strategies employed to apply water-deficit stress. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1422-0067 1661-6596 |
Relation: | https://www.mdpi.com/1422-0067/22/6/2813; https://doaj.org/toc/1661-6596; https://doaj.org/toc/1422-0067 |
DOI: | 10.3390/ijms22062813 |
URL الوصول: | https://doaj.org/article/1d68669ff1f34b10bbc85df58aa369cd |
رقم الأكسشن: | edsdoj.1d68669ff1f34b10bbc85df58aa369cd |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 14220067 16616596 |
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DOI: | 10.3390/ijms22062813 |